Morph filter

I’m trying to use this filter, but everytime I plug it in, and play with it, I keep wondering -do I realy need this?

I tried to use it as a simple LP/HP filter, but obviously it was not made for this. So only thing I see any use of it is making some dance build ups or something. But this could be done with other filters just fine.

So, can somebody please explain how to use this Morph filter. What is it meant to do, and in what way?